Alan Chavez - who plays Julian - was involved in an argument amongst his friends which escalated into gunfire. More shots were fired when the police arrived on the scene, with the result that Chavez was mortally wounded. The film is dedicated to him.
Jorge Michel Grau's intention was to make a film about familial disintegration. It just happened to be a horror movie about cannibals.
Juan Carlos Colombo (Funeral Director) and Daniel Giménez Cacho (Tito) played the same roles in Cronos (1993).
Inspirations for director Jorge Michel Grau included Vincent Gallo's Buffalo '66 (1998), the films of Michael Haneke and Claire Denis' Trouble Every Day (2001).